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首页> 外文期刊>Journal of dentistry >Combining structural-thermal coupled field FE analysis and the Taguchi method to evaluate the relative contributions of multi-factors in a premolar adhesive MOD restoration.
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Combining structural-thermal coupled field FE analysis and the Taguchi method to evaluate the relative contributions of multi-factors in a premolar adhesive MOD restoration.

机译：结合结构-热耦合场有限元分析和田口方法来评估前磨牙胶MOD修复中多因素的相对贡献。

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OBJECTIVES: The aim of this study was to determine the relative contribution of changes in restorative material, cavity dimensions, adhesive layer adaptation, and load conditions on the biomechanical response of an adhesive Class II MOD restoration during oral temperature changes. METHODS: A validated finite-element (FE) model was used to perform the structural-thermal coupled field analyses and the Taguchi method was employed to identify the significance of each design factor in controlling the stress. RESULTS: The results indicated that thermal expansion in restorative material amplified the thermal effect and dominated the tooth stress value (69%) at high temperatures. The percentage contributions of the load conditions, cavity depth, and cement modulus increased the effect on tooth stress values 46%, 32%, and 14%, respectively, when the tooth temperature was returned to 37 degrees C. Load conditions were also the main factor influencing the resin cement stress values, irrespective of temperature changes. Increased stress values occurred with composite resin, lateral force, a deeper cavity, and a higher luting cement modulus. CONCLUSIONS: The combined use of FE analysis and the Taguchi method efficiently identified that a deeper cavity might increase the risk of a restored tooth fracture, as well as a ceramic inlay with a lower thermal expansion, attaining a proper occlusal adjustment to reduce the lateral occlusal force and low modulus luting material application to obtain a better force-transmission mechanism are recommended.
机译：目的：本研究的目的是确定口腔温度变化过程中，修复材料，空腔尺寸，粘合剂层适应性和负载条件变化对II类MOD粘合剂修复物的生物力学响应的相对贡献。方法：使用经过验证的有限元（FE）模型进行结构-热耦合场分析，并使用Taguchi方法确定每个设计因素在控制应力中的重要性。结果：结果表明，修复材料的热膨胀增强了热效应，并在高温下支配了牙齿的应力值（69％）。当牙齿温度恢复到37摄氏度时，负载条件，型腔深度和水泥模量的百分比贡献分别增加了对牙齿应力值的影响46％，32％和14％。负载条件也是主要因素与温度变化无关的影响树脂水泥应力值的因素。复合树脂，侧向力，更深的模腔和更高的胶结水泥模量会增加应力值。结论：有限元分析和Taguchi方法的结合使用可以有效地识别出较深的蛀牙可能会增加牙齿修复的风险，以及陶瓷镶嵌物的热膨胀较低，从而可以进行适当的咬合调节以减少侧面咬合建议使用力和低模量的浸胶材料以获得更好的力传递机制。

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